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WO1997045994A1 - Reseau telephonique - Google Patents

Reseau telephonique Download PDF

Info

Publication number
WO1997045994A1
WO1997045994A1 PCT/FI1997/000329 FI9700329W WO9745994A1 WO 1997045994 A1 WO1997045994 A1 WO 1997045994A1 FI 9700329 W FI9700329 W FI 9700329W WO 9745994 A1 WO9745994 A1 WO 9745994A1
Authority
WO
WIPO (PCT)
Prior art keywords
telephone
bus
channel
radio
channels
Prior art date
Application number
PCT/FI1997/000329
Other languages
English (en)
Inventor
Markku Tikkala
Osmo Eerola
Esa Heinonen
Original Assignee
Miratel Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Miratel Oy filed Critical Miratel Oy
Priority to EP97924044A priority Critical patent/EP0894394A1/fr
Priority to AU29640/97A priority patent/AU2964097A/en
Publication of WO1997045994A1 publication Critical patent/WO1997045994A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0435—Details
    • H04Q11/0471—Terminal access circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
    • H04M9/022—Multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/16—WPBX [Wireless Private Branch Exchange]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13096—Digital apparatus individually associated with a subscriber line, digital line circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13097—Numbering, addressing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13176—Common channel signaling, CCS7
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13299—Bus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the invention relates to a telephone system which comprises one or more telephones and in which internal calls between telephones and other functions provided by a private branch exchange telephone system are available.
  • a PABX is fully automatic: when a number is dialled, the call is automatically switched. It is possible to have direct dialling numbers and a variety of other facilities offered by a private automatic branch exchange, such as call waiting, call forwarding, conference calling, and automatic providing of statistical information on calls. Private branch exchanges of both types allow charge- free internal calls. If a company is geographically widely spread, private branch exchanges within different areas can be interconnected by rented lines, whereby it is possible to form a private branch exchange network where internal calls are charge-free.
  • the centrex service is a service offered by the teleoperator in addition to the basic services.
  • the centrex which is associated with a telephone exchange and provided by the operator, offers the same services as a PBX or PABX of a company, whereby the company does not have to purchase and maintain a private branch exchange of its own.
  • FIG. 2 is a general view of ISDN telephones.
  • a telephone is connected to a private branch exchange or a network terminal by an ISDN interface part 12 which provides a 2B+D interface.
  • the line is matched by a transformer 11 to a telephone comprising a processor 13, software 14, a memory 15, a keyboard, and a display 16.
  • the handset is connected to the processor by an adapter 17; in addition, a separate adapter 18 may be provided for connecting a general-purpose computer PC to the telephone.
  • the computer may thus use the ISDN connection, which is much faster than an analogue connection.
  • an ISDN telephone has extremely many uses as compared with an analogue telephone.
  • FIG. 1 D The system employs a conventional PABX/PBX exchange, the extension side of which is connected to a radio branch exchange.
  • a plurality of base stations is connected to the radio branch exchange by cabling of star configuration.
  • Each of the base stations may simultaneously communicate with several radio telephones.
  • the solution of the figure is particularly suitable for use in a time division multiplexed radio system, where a radio channel consists of correspondingly numbered time slots of successive frames. When the transmission and reception take place on the same frequency, it is possible with one frequency to form as many channels as there are time slot pairs in the frame.
  • An example of such a time division system is the DECT system (Digital European Cordless Telephony), which will be described briefly with reference to Figures 3A and 3B.
  • each frequency channel is divided in the time domain into frames of 10 ms on the TDMA principle, and a frame is divided into 24 time slots, the first twelve time slots F1 ,...,F12 being downlink time slots, and the other twelve time slots R1 ,...,R12 being uplink time slots.
  • the time slots form pairs in such a manner that time slots with corresponding numbers, e.g. F5, R5, form a duplex channel. A channel is thus unambiguous ⁇ ly determined by the time slot and the frequency.
  • One channel can transfer data at the rate of 32 kbit/s, but it is possible to allocate a plurality of channels to a telephone according to the need; the transfer rate achieved when all the time slots are used will be 384 kbit/s, which is sufficient for instance for duplex video transmission in accordance with the standard H.320.
  • the possibility of allocating time slots (channels) and thereby transfer rate according to the need is a significant advantage of the DECT.
  • One time slot is sufficient for the services of a PSTN network, and 1 to 5 time slots are needed for an ISDN network, whereas all of the 12 time slots are required when the transfer rate of a local area network (LAN) is utilized.
  • LAN local area network
  • Figure 3B illustrates the contents of a data packet sent during one time slot.
  • the packet contains at first a 4-byte sequence of synchronization bits, then 6 bytes of signalling data, 2 bytes for error control, 40 bytes of digitized speech or data, and finally 4 bits for error control.
  • Both the private branch exchange solution and the centrex solution are expensive particularly for small offices and home offices SOHO. The price becomes even higher if the extension lines are replaced with a radio system, such as DECT.
  • a small office has no other alternative than to buy a private branch exchange or centrex service. Since there is little staff in a small office, and the staff is usually busy, the internal and external communication of such an office should be arranged extremely economically and with light investments. In such an office, efficient communication would also require the possibility of using wireless connections.
  • EP 0242030, WO 88/05240 and WO 86/06570 disclose a telephone system where the required intelligence is distributed to telephones interconnected by a common broadband transmission line with a number of relatively narrow-band channels.
  • Each telephone possesses intelligence and switching capacity to the extent that it can switch itself through the common transmission line to any other telephone to allow bidirectional traffic.
  • the conventional centralized switching system of star configuration is thus avoided.
  • Such a system requires, however, a considerable amount of designing relating to the complicated channel structure, protocol and signalling used on the common transmission line, and to the software and circuit solutions required by the intelligence of the actual telephone. This as well as the complicated and expensive construction of the telephones make the system more expensive, which reduces its competitive ⁇ ness as compared with the conventional centralized telephone systems. It would also be difficult to introduce wireless connections.
  • a further object is to utilize wireless telephones without a separate radio branch exchange and a PBX connected thereto.
  • Yet another object is to provide a system which has low initial costs and expanding costs, and which can be easily expanded from a system of a few telephones to a system of dozens of telephones.
  • a telephone system consists of telephones and a bus interconnecting the telephones.
  • the channel structure of the bus and data transmission through the bus are in compliance with a radio standard.
  • circuits and solutions manufactured for the standard in question can be used for implementing the telephones, which lowers the price of the telephones considerably.
  • part of the bus can be implemented as a radio path using radio parts of the standard in question for adapting baseband channels and radio channels.
  • One of the most significant advantages of the invention is that it allows a telephone to operate as a wireless base station using radio parts of a radio standard for adapting baseband channels and radio channels. Since the same channel structure and protocol are used on the bus and at the radio interface, no special arrangements are required in the telephone. This allows a wireless branch exchange or a combination of a wireless and a fixed branch exchange to be provided. Furthermore, since the radio interface is in compliance with a radio standard, the wireless subscriber station may be any terminal manufactured for this radio standard. The invention also allows new functions added to the radio standard to be easily introduced into the telephone system.
  • the bus carries baseband signalling of a radio system, and depending on the radio system used, the bus has a plurality of time division duplex channels TDD or a plurality of frequency division duplex channels FDD. Each channel can transfer one speech or data connection. At least one channel may be allocated as a signalling channel to which all the telephones listen continuously, or each channel may contain a signalling portion.
  • One or more telephones of the system may be connected to a PSTN or ISDN network through an analogue, or preferably digital, multichannel connection, and this telephone converts the channels received from the bus according to the baseband signalling of the radio system into a form suitable for the subscriber line used, and vice versa.
  • a telephone comprises at least two basic parts: an actual telephone part, which is preferably an ISDN telephone, and a baseband part, which adapts speech channels of a public switched telephone network to the channels on the bus, and vice versa.
  • a telephone may also comprise a radio part, if the baseband bus is replaced with a radio path and/or if the telephone operates as a base station for a hand-held mobile phone. Any telephone can independently allocate desired channels of the bus to itself, establish and maintain a connection, and finally release the channels. When allocating or releasing channels, a telephone sends allocation/release messages, as signalling on the bus, to other telephones connected to the bus for their information. The signalling messages on the bus can be transmitted for instance on the signalling channel or in the signalling part of the bus channels.
  • each telephone may have access to an up-to-date centralized or distributed database containing the individual addresses of the telephones.
  • the addressing and numbering scheme are the same as in a public switched telephone network; in the case of an ISDN, ISDN numbering is followed.
  • the database may also contain information on the status of outgoing connections to a PSTN or ISDN, and information on the status of the channels of the bus interconnecting the telephones.
  • the signalling messages transmitted on the bus update the information stored in the database in real time.
  • the connections of the telephone system and the channels of the bus themselves may contain the above-mentioned status information, for example in a message transmitted on the signalling channel or in the signalling part of a channel, whereby it is not necessary to store the status information in the database.
  • subscriber A dials the number of subscriber B.
  • the telephone searches for an idle channel and allocates it. Simultaneously it sends a paging to the telephone of subscriber B as signalling on the bus, whereby the telephone of subscriber B switches itself to the allocated channel.
  • An internal call connection is thus established.
  • the telephone searches for and allocates an idle channel and external line.
  • the telephone connected to the telephone network switches the channel of the bus to the selected external line, whereby a connection is established.
  • baseband signalling of a general radio system such as the CT2, DECT or GSM standard
  • the DECT standard is recommended, since it allows 12 duplex channels to be formed on one bus when one frequency is used.
  • Each telephone can perform the functions of the MAC layer.
  • Figures 1A to 1 D illustrate telephone systems of the prior art
  • Figure 2 is a block diagram of an ISDN telephone
  • Figure 3A illustrates the frame structure of the DECT system
  • Figure 3B illustrates the contents of a packet to be sent in a time slot
  • Figure 4 illustrates a telephone of the invention
  • Figure 5 illustrates a telephone system of the invention.
  • the ISDN telephone serving as the basic part is provided with a baseband module comprising at least a memory 41 , a processor 42, a block 44 performing the ISDN-radio system conversion, a block 46 performing multiplexing/demultiplexing, and a bus adapter 45.
  • the radio system used is preferably the known DECT system, wherefore the baseband module is in practice a DECT telephone without a radio part and without a user interface. In the description below, it will be assumed that the radio system is DECT.
  • the baseband module performs the functions of the MAC layer: allocating and releasing channels consisting of time slots, processing speech and data carried on channels from the ISDN part of the telephone, i.e.
  • the public switched telephone network to comply with the radio system used, building packets, and multiplexing them into correct time slots of the frame.
  • the corresponding functions to be performed are demultiplexing speech and data inserted in time slots of frames, i.e. in packet form, received from the bus 47, converting information contained in the packet to the format of the ISDN standard, and finally supplying it to the ISDN part of the telephone for further processing and for forwarding it to the public switched telephone network.
  • the telephone converts channels of the radio system of the bus 47 into ISDN channels of the telephone network, and vice versa.
  • information received from the bus is supplied to a PC 19 connected to the telephone, and vice versa, and a speech signal received from the handset 110 is converted into packets to be transmitted on a channel of the bus, and vice versa.
  • the ISDN telephone may comprise a radio part 43.
  • it may serve as a base station for one or more radio telephones.
  • up to 12 DECT telephones may communicate with the base station simultaneously.
  • the fixed or dynamically adjustable part of the twelve channels of the DECT is used for the bus and the rest is used for the radio channels to DECT or GSM/DECT telephones.
  • a multiplexer 46 for example, separates two time slots from the frame for the radio part 43, whereas the other ten are supplied to the bus 47.
  • the baseband module and radio part together form a known DECT telephone, the components of which may be positioned on the same board as the ISDN part. All telephones of the telephone system may be as described above.
  • All telephones are connected to the bus 47, and the communication between telephones, and the communication between a single telephone and the public switched telephone network take place through the bus 47.
  • Baseband signalling of the radio system standard employed is used on the bus, and the baseband part is responsible for the control, processing, synchronization, etc.
  • the bus may be a single twisted pair cable, whereby 12 simultaneous calls can be transmitted on it when DECT is used. If the switching capacity is to be increased, a new twisted pair cable corresponding to a different frequency on the radio path is connected in parallel. Since the DECT has ten frequencies, it is possible to construct a bus with 120 channels. A telephone system may thus comprise several hundreds of telephones. The baseband module must then be expanded correspondingly to allow it to process all frequencies. In the DECT system this is fairly easy to implement.
  • FIG. 5 shows the entire telephone system of the invention.
  • Telephones 51 , 54, 55 and 56 which are essentially in accordance with Figure 4, are connected through their bus adapter to a common baseband bus, where the channels are formed in compliance with the radio system.
  • Subscriber lines extend from telephones 51 and 56 through network terminals 57 to a telephone exchange 50 of a public switched telephone network.
  • the subscriber line is an ISDN basic rate interface (2B+D).
  • Telephones 54 and 55 do not comprise a radio part, whereas telephones 51 and 56 comprise one.
  • telephone 56 serves not only as a telephone with a handset but also as a base station for radio telephones d, e, and f.
  • the bus between telephones 51 and 52 is not implemented with a fixed cable but as a radio bus.
  • the telephones must therefore comprise a radio part (part 43 in Figure 4).
  • the transmission powers of the DECT system allow telephones to be located at a distance of 50 to 300 metres from each other.
  • the bus between telephones 52 and 53 is implemented with a cable, wherefore the channels are baseband channels.
  • Telephones 53 and 52 also serve as base stations for radio telephones.
  • All telephones of the system are provided with the same software, stored in a software module 14.
  • the software is used by the processor 13 of the ISDN part, the processor 42 of the baseband part, and any other processors, Figure 4.
  • the software allows each telephone to allocate any idle channels independently and thus to establish a call to another telephone of the system or to the public switched telephone network. All telephones listen to maintenance messages of the system continuously on the signalling channel or in the signalling part of the bus channels.
  • each telephone has access to a database containing real-time data on each channel between the telephones, and on the channels leading from telephone 51 to the telephone exchange 50 and their busy/idle status.
  • the database is, for instance, distributed to the memory of each telephone.
  • the signalling messages of the bus update the data contained in the database, and thus each telephone always has up-to-date information on the state of the system.
  • information on the channels of the system and their busy/idle status is provided in connection with signalling on the channels so as to be available to each telephone.
  • a telephone system consisting preferably of ISDN telephones therefore requires no separate database.
  • the system of the invention comprises only two telephones, both of which may be connected to the public switched telephone network. At the same time, these telephones may serve as base stations for radio telephones, which makes internal calls between the radio telephones possible. In this way, it is possible to implement a partly wireless telephone system of a small office.
  • the telephone system of the invention has many advantages. Since the private branch exchange function is distributed to telephones, the system is less expensive than conventional private branch exchange solutions, when the number of telephones does not exceed about 20. It is not expensive to expand the system, since it requires only a new telephone to be connected to the bus. Unlike in the conventional cabling systems in a star configuration, only one cable is required, and no special skill is required in installing the cable. Since a private branch exchange is not required, the system takes up less space.
  • the telephone With a general-purpose computer, the telephone can be used as a faster data transmission equipment replacing an analogue modem. DECT time slots can be allocated according to the need.
  • the computers When a computer is connected to more than one telephones, the computers may communicate with one another through the bus. No separate cabling interconnecting the computers is thus necessarily required. Interconnecting telephones by a bus, for example in compliance with the DECT protocol, makes bidirectional transmission of speech in one twisted pair cable possible. A plurality of telephones may be connected in parallel to the twisted pair cable. If the cabling is complicated, part of the twisted pair cable bus may be replaced with a radio bus. If each telephone comprises a radio part, good radio coverage is achieved without any special base station designing.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Le réseau téléphonique de cette invention comprend des téléphones et un bus reliant les téléphones entre eux. Le bus porte la signalisation de la bande de base d'un système radio et comporte une pluralité de canaux. Au moins un des téléphones peut être connecté à un réseau RTPC ou RNIS, ceci permettant de convertir les canaux qui sont reçus en provenance du bus et qui sont conformes à la signalisation de la bande de base du système radio dans un format adapté à la ligne d'abonné employée et vice versa. Un téléphone comprend au moins deux éléments de base: un téléphone, de préférence un téléphone RNIS et une bande de base d'un système radio, de préférence le système DETC. Le téléphone peut également comprendre une radio si le bus de bande de base est partiellement ou entièrement remplacé par un trajet radioélectrique ou si le téléphone sert de station de base pour un radiotéléphone portatif. N'importe quel téléphone peut indépendamment s'attribuer à lui-même des canaux désirés du bus, établir et maintenir une connexion et en dernier lieu libérer les canaux.
PCT/FI1997/000329 1996-05-31 1997-05-29 Reseau telephonique WO1997045994A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP97924044A EP0894394A1 (fr) 1996-05-31 1997-05-29 Reseau telephonique
AU29640/97A AU2964097A (en) 1996-05-31 1997-05-29 Telephone system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI962312 1996-05-31
FI962312A FI962312A7 (fi) 1996-05-31 1996-05-31 Puhelinjärjestelmä

Publications (1)

Publication Number Publication Date
WO1997045994A1 true WO1997045994A1 (fr) 1997-12-04

Family

ID=8546134

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1997/000329 WO1997045994A1 (fr) 1996-05-31 1997-05-29 Reseau telephonique

Country Status (4)

Country Link
EP (1) EP0894394A1 (fr)
AU (1) AU2964097A (fr)
FI (1) FI962312A7 (fr)
WO (1) WO1997045994A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060727A1 (fr) * 1998-05-20 1999-11-25 Siemens Aktiengesellschaft Systeme de radiotelecommunication amrt comportant plusieurs stations radio nodales
EP0892578A3 (fr) * 1997-07-18 1999-12-22 Samsung Electronics Co., Ltd. Système téléphonique sans fil (DECT) capable de fournir un service de communication de données
FR2781954A1 (fr) * 1998-07-28 2000-02-04 Canon Kk Procede et dispositif de communication sur un reseau
FR2781960A1 (fr) * 1998-07-28 2000-02-04 Canon Kk Procede et dispositif de communication sur un reseau
FR2781953A1 (fr) * 1998-07-28 2000-02-04 Canon Kk Procede et dispositif de communication sur un reseau
EP0984651A3 (fr) * 1998-07-28 2000-11-29 Canon Kabushiki Kaisha Procédé et dispositif de communication sur un réseau
EP0984652A3 (fr) * 1998-07-28 2000-11-29 Canon Kabushiki Kaisha Procédé et dispositif de communication sur un réseau
GB2355370A (en) * 1999-07-27 2001-04-18 Sagem Method for setting up a communication through the Internet or similar network
DE19952900A1 (de) * 1999-11-03 2001-05-10 Deutsche Telekom Ag Verfahren zur Kommunikation von schnurlosen Telefonen untereinander
FR2804214A1 (fr) * 2000-01-24 2001-07-27 Canon Kk Procede et dispositif de localisation d'un equipement sans fil dans un reseau de telecommunications, et systemes les mettant en oeuvre
DE102004057380A1 (de) * 2004-11-26 2006-06-01 Te.Inter.Com Gmbh Telekommunikationsanlage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006570A1 (fr) * 1985-04-25 1986-11-06 International Standard Electric Corporation Systeme de communication telephonique a ligne unique
EP0242030A2 (fr) * 1986-04-15 1987-10-21 Chauncey I Bartholet Système téléphonique distribué
WO1988005240A1 (fr) * 1987-01-09 1988-07-14 Unvala Limited Systemes de communications

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006570A1 (fr) * 1985-04-25 1986-11-06 International Standard Electric Corporation Systeme de communication telephonique a ligne unique
EP0242030A2 (fr) * 1986-04-15 1987-10-21 Chauncey I Bartholet Système téléphonique distribué
WO1988005240A1 (fr) * 1987-01-09 1988-07-14 Unvala Limited Systemes de communications

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0892578A3 (fr) * 1997-07-18 1999-12-22 Samsung Electronics Co., Ltd. Système téléphonique sans fil (DECT) capable de fournir un service de communication de données
WO1999060727A1 (fr) * 1998-05-20 1999-11-25 Siemens Aktiengesellschaft Systeme de radiotelecommunication amrt comportant plusieurs stations radio nodales
EP1653708A3 (fr) * 1998-07-28 2006-05-17 Canon Kabushiki Kaisha Procédé et dispositif de communication sur un réseau
FR2781954A1 (fr) * 1998-07-28 2000-02-04 Canon Kk Procede et dispositif de communication sur un reseau
FR2781953A1 (fr) * 1998-07-28 2000-02-04 Canon Kk Procede et dispositif de communication sur un reseau
EP0984651A3 (fr) * 1998-07-28 2000-11-29 Canon Kabushiki Kaisha Procédé et dispositif de communication sur un réseau
EP0984652A3 (fr) * 1998-07-28 2000-11-29 Canon Kabushiki Kaisha Procédé et dispositif de communication sur un réseau
US7116645B2 (en) 1998-07-28 2006-10-03 Canon Kabushiki Kaisha Method and device for communication on a network
FR2781960A1 (fr) * 1998-07-28 2000-02-04 Canon Kk Procede et dispositif de communication sur un reseau
US6894992B1 (en) 1998-07-28 2005-05-17 Canon Kabushiki Kaisha Switching communication modes in a network
US6574452B1 (en) 1998-07-28 2003-06-03 Canon Kabushiki Kaisha Method and device for communication on a network
GB2355370A (en) * 1999-07-27 2001-04-18 Sagem Method for setting up a communication through the Internet or similar network
DE19952900A1 (de) * 1999-11-03 2001-05-10 Deutsche Telekom Ag Verfahren zur Kommunikation von schnurlosen Telefonen untereinander
DE19952900B4 (de) * 1999-11-03 2011-05-12 Deutsche Telekom Ag Verfahren zur Kommunikation von schnurlosen Telefonen untereinander
FR2804214A1 (fr) * 2000-01-24 2001-07-27 Canon Kk Procede et dispositif de localisation d'un equipement sans fil dans un reseau de telecommunications, et systemes les mettant en oeuvre
DE102004057380A1 (de) * 2004-11-26 2006-06-01 Te.Inter.Com Gmbh Telekommunikationsanlage

Also Published As

Publication number Publication date
EP0894394A1 (fr) 1999-02-03
FI962312A7 (fi) 1997-12-01
FI962312A0 (fi) 1996-05-31
AU2964097A (en) 1998-01-05

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